[UPDATE: Some people are suggesting on Twitter—here and here—that it's a wild finch. Still, curious behaviour. And we don't know if they've called Humane Society. Oh, and someone is missing a bird, but it's not the one below.]

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These pictures were taken by Brad Crough from inside his house in Peterborough's West End. "This bird has been trying to get inside all day," he tweets. And Brad's cat obviously wants the bird inside as well. Not a good idea.